Self-shank-button-boring machine.



A. DVORSKY. SELF SHANK BUTTON BORING MACHINE.

APPLICATIQN FILED SEPT. 4, 1915.

1,175347. Patented Mar. 14, 1916.

2.3 WITNESSES: 16 11v VENTOR I mmdiu rww i A TTORNE Y ANTON DVORSKY, OFNEW YORK, N.

SELF-SHANK-BUTTON-BORING- MACHINE.

Specification of Letters Patent.

Patented Mar. 14, 1916.

Application filed September 4, 1915. Serial No. 48,947.

To all whom it may concern.

Be it known that I, ANTON DVORSKY, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented new and useful Improvements in Self-Shank-Button-BoringMachines, of which the following is a specification;

This invention relates to an improvement in button boring machines andhas as its principal object to provide means whereby holes can bedrilled in the shank of so-called self-shank buttons at a predetermineddistance from the top of the shank whatever the height of the latter andthe thickness of the head of the button may be.

A further object of the invention is to provide such means which areadjustable, so that the distance of the bore from the top of the shankmay be regulated.

A still further object of the invention is to provide means of thecharacter described, which may easily be installed on any ordinarybutton boring machine.

It is also the object of this invention to provide adjust-able means inconnection with the above said means for holding buttons of differentsizes.

Reference will now be had to the accompanying drawing in which isillustrated one preferred form of embodiment of my invention and inwhich Figure 1 is a partly sectional, partly elevational fragmentaryview of my device in operation. Fig. 2 is a plan view of the sameshowing hidden parts in dotted lines. Figs. 3 and 4; are plan views ofthe chuck forming part of my device with different sizes of buttons heldthereby, and Fig. 5 shows in cross section two buttons of differentthickness of head and length of shank having the bore at the samedistance from the top of the shank according to my invention.

chucks have four of them. In my device the two upper shanks are cut awayat 9 and only the two lower shanks remain. Also in the ordinary chucksthe buttons are held in front of the chuck at right angles to thelongitudinal axis thereof, whereas in vmy device they are laidhorizontally on the upper surface of the chuck and held in position by apair of adjustable blocks, such as 10. On top of the tube 6, 1 provide astandard 11 into which is j ournaled a horizontal bracket 12 and securedtherein by a set screw 13.

The bracket12 projects over the outer end of the chuck 8 and has athreaded bore 14 formed in it in which is mounted a threaded bolt 15projecting right over the center of the button 16 held by the chuck. Thedistance of the lower end of the bolt 15 from the chuck may be regulatedby turning the bolt and fixing it in the desired position by a counternut 17. v

In ordinary boring machines of this type, the chuck is operated by aspring controlled reciprocating movement in respect to the spindle,which is not indicated in the drawing, as it does not form part of thepresent invention. The reciprocating movement opens and closes the chuckby means of the wedge like action of the oblique surfaces 18 and 19 ofthe chuck and the spindle, respectively, as is obvious from the drawing.

In my invention the chuck is raised and lowered by this reciprocatingaction and the former movement is limited by the lower end 20 of thebolt 15 touching the top of the shank 21 of the button 16.

The drill 22 being always at the same height in respect to the spindle6, it is evident that the bore 23 (Fig. 5) will always be made at thesame distance from the top of the shank 21, whatever the thickness ofthe button be. By turning the bolt 15 this distance of the bore from thetop of the shank of the button may be regulated to a certain extent, aswill be necessary for meeting very great differences in the thickness ofthe buttons to be bored.

By shifting the bracket 12 forward and backward in the standard 11, thebolt 15 may be brought into vertical alinement with the center ofbuttons of various sizes.

It will be understood that while I have thus shown and described thepreferred form of embodiment of my invention, I do not wish to belimited to its mechanical details but may resort to such alterations andmodifications as come within the scope of the claims hereunto appended.

I claim:

1. In a machine for boring holes in selfshank buttons, the combinationof a tubular spindle, a button-holding chuck mounted in said spindle,adapted to be reciprocated therein, means formed on said chuck and insaid. spindle, controlled by said reciprocating movement, for alteringthe position of said. chuck in respect to the longitudinal axis of saidspindle and means attached to said spindle coacting with the button heldby said chuck for limiting the movement of the latter in respect to thelongitudinal axis of said spindle.

In a machine for boring holes in selfshank buttons, the combination of atubular spindle, a button-holding chuck mounted in said spindle, adaptedto be reciprocated therein, means formed on said chuck and in saidspindle, controlled by said reciprocating movement, for altering theposition of said chuck in respect to the longitudinal axis of saidspindle and adjustable means at tached to said spindle coacting with thebut ton held by said chuck for limiting the movement of the latter inrespect to the longitudinal axis of said spindle.

8. In a machine for boringholes in selfshank buttons, the combination ofa button.- holding chuck mounted in a tube and adapted to be actuatedtherein both longitudinally and radially in respect to its longitudinalaxis, an adjustable holder mounted on said tube and an adjustable memberh ld by said holder, adapted to contact with the button held by saidchuck and thereby limit the radial movement thereof, substantially asand for the purpose set forth.

i kNTON DVORSKY.

Copies of this patent may be obtained forv five cents each, byaddressing the. Commissioner of Eatents, Washington, D. C.

